package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;

import com.itheima.reggie.service.EmployeeService;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.util.DigestUtils;

import org.springframework.web.bind.annotation.*;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;


@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 登录
     * @param employee 员工
     * @return {@link R}<{@link Employee}>
     */
    @PostMapping("/login")
    public R<Employee> login(HttpSession session, @RequestBody Employee employee) {
        //1.将页面得密码进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //2.根据页面数据查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        //3.获取数据库emp
        Employee emp = employeeService.getOne(queryWrapper);

        //下面三种情况会登录失败
        //4.如果数据库的emp为空
        if (emp == null) {
            return R.error("登录失败");
        }
        //5.如果密码不匹配
        if (!emp.getPassword().equals(password)) {
            return R.error("登录失败");
        }
        //6.如果状态为0
        if (emp.getStatus() == 0) {
            return R.error("账号已禁用");
        }
        //7.将登录成功的id放入session中
        session.setAttribute("employee", emp.getId());
        return R.success(emp);
    }

    /**
     * 注销
     *
     * @param request 请求
     * @return {@link R}<{@link String}>
     *///退出
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理Session中保存的当前登录员工的id
        request.getSession().getAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 保存
     * @param request  请求
     * @param employee 员工
     * @return {@link R}<{@link String}>
     */
    //添加员工
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工,员工信息{}", employee.toString());

        //设置初始密码123456,需要进行md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        Long empId = (Long) request.getSession().getAttribute("employee");

        //获取当前用户的ID
        employeeService.save(employee);
        return R.success("新增员工成功");

    }

    /**
     * 页面
     * @param page     页面
     * @param pageSize 页面大小
     * @param name     名字
     * @return {@link R}<{@link Page}>
     *///分页
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {

        log.info("page={},pageSize={},name={}", page, pageSize, name);
        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> lambdaQueryWrapper = new LambdaQueryWrapper();
        //添加过滤条件
        lambdaQueryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //添加排序条件
        lambdaQueryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询
        employeeService.page(pageInfo, lambdaQueryWrapper);
        return R.success(pageInfo);
    }

    /**
     * 更新
     *
     * @param request  请求
     * @param employee 员工
     * @return {@link R}<{@link String}>
     *///修改员工信息和状态
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        log.info(employee.toString());
        Long empId = (Long) request.getSession().getAttribute("employee");
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    /**
     * 通过id
     *
     * @param id id
     * @return {@link R}<{@link Employee}>
     */
    //根据id查询员工信息
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        log.info("根据id查询员工信息");
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到对应的员工信息");
    }



}
